/*
 * Copyright (c) 2012 Johan Fylling
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights 
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 * copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
 * THE SOFTWARE.
 */

part of engine;


class CollidableRectangle extends CollidablePolygon {
  Vector2 _halfSize;
  num     _boundingSphereRadius;
  
  CollidableRectangle (Vector2 halfSize) {
    this.halfSize = halfSize;
    addNormal(new Vector2(0,1));
    addNormal(new Vector2(1,0));
  }
  
  Vector2 get halfSize => new Vector2.copy(this._halfSize);
  
  void set halfSize (Vector2 halfSize) {
    this._halfSize = new Vector2.copy(halfSize);
    this._boundingSphereRadius = this._halfSize.length;
    
    clearVertices();
    // Add vertices counter clockwise.
    addVertex(new Vector2(this._halfSize.x, this._halfSize.y));
    addVertex(new Vector2(-this._halfSize.x, this._halfSize.y));
    addVertex(new Vector2(-this._halfSize.x, -this._halfSize.y));
    addVertex(new Vector2(this._halfSize.x, -this._halfSize.y));
  }
  
  num get boundingSphereRadius => this._boundingSphereRadius;
  
  toJson () {
    var data = super.toJson();
    assert(data is Map);
    data["type"] = "collidable_rectangle";
    data["half_size"] = halfSize;
    return data;
  }
}


class CollidableRectangleStorageHandler {
  call (StorageManager manager, Map attributes) {
    var sizeAttributes = attributes["half_size"];
    assert(sizeAttributes is Map);
    Vector2 halfSize = new Vector2(sizeAttributes["x"], sizeAttributes["y"]);
    
    return new CollidableRectangle(halfSize);
  }
}
